MCQ
$\frac{d}{d x}(\cos 4 x)=$
  • A
    $-\sin 4 x$
  • B
    $4 \sin 4 x$
  • $-4 \sin 4 x$
  • D
    $-\frac{1}{4} \sin 4 x$

Answer

Correct option: C.
$-4 \sin 4 x$
C

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